Mechanical sand-bamming machine



D. J. CAMPBELL. MECHANICAL SAND RAMMING MACHINE.

APPLICATION FILED JUNE 14. 1919- SHEET I.

Patented Nov. 11

3 S H EETS D. J. CAMPBELL. MECHANICAL SAND RAMNHNG MACHINE.

APPLICATION FILED JUNE I4, 1919.

Patented Nov. 11, 1919.

3 SHEETSSHEET 2.

A Q .A w 5 r A u, i 0 Mm U ml 7 m w Z5 w 0. WW; g a V J 0 w w 96 H n d av 00/ J 5 a 0 U w W X I {LP w Y0? mm 6 Q 0 o a ,1 V. s U 0 .0 //0 1 .0 MW I|l I t. 6 1 5 u 0 v III l Vl ll 4/U j TH... i 6 0 2 w Q/UJ 3 w 9 92 2 9 a 0 u 2 6 w u a 3 x w W Nu w J 2 w PL WW2 L M 0 Q Q D. J. CAMPBELL. MECHANICAL SAND RAMMING MACHINE.

APPLICATION FILED JUNE 14, 19!!)- Patented Nov. 11, 1919.

'3 SHEETS-SHEET 3.

#6 WW. Q M W W E MAM V .77., x 0/0.? 5 Z M I U fw Z 4 54 NW w Q? q 3: x flu Dw Q a mm ff? UNITED STATES PATENT OFFICE.

Domain .1. CAMPBELL, or mnsxneon HEIGIIBI'IS, MICHIGAN.

skilled in the art to which it appertains to make and use the same.

This invention relates to sand ramming machines for use in ramming sand mechanically in a flask around a mold. It is essential in molding that the sand be rammed so as to have a certain solidity about a mold and usually it is done manually, the oper- .ator tamping or ramming the sand with a suitable implement for thepurpose. In my invention it is designed that the sand shall be delivered into the flask and at the same time put intothe flask with force suflicient to practically ram the sand to the required degree, all being accomplished mechanically and without the intervention of laborother than the operator of the machine. A further object of the invention is to provlde a machine in which a considerable range of movement is present so that the sand' may be directed to different parts of the flask as necessary for the proper filling of the flask. Other objects and purposes conslst of means for bringing the sand to the machine in proper relation thereto to be recelved and acted upon by it, in means for controlling the passage of sand to the machine, in novel constructions and arrangements of parts for automatically insuring that the machine shall deliver the sand to the mold, and in many other novel features of construction for the effective accomplishment of the ends for which the invention is designed, all of which .will appear fully a d detail as understanding of the inventlon 1s had from the-following description, taken in connection with the accompanying drawings showing a preferred form of the invention, in

which drawings, v Figure 1 is a side elevat on of the sand conveying means for bring ng the sand to the mechanical ramming mechanism.

Fig. 24's a partial vertical section and elevation of the mechanical sand ramming device, its mounting and operating mechanism for driving thesame.

MECHANICAL smb-naumme nonma- Specifications! Letters Patent. Patented Nov. 11, 1919. Application filed June 14, 1919. Serial No. 304,328.

Fig. 3 is a vertical section taken transversely through the sand ramming mecha-' nism, the motor for driving the same and the outlet thereto, and v Fig. 4 is afront elevation thereof. Like reference characters refer to like parts in the difierent views of the drawings.

In construction, a support comprised of vertical posts 1, attached to a suitable base 2 and with diagonal braces 3 disposed between a sand receiving receptacle 4 on the base 2 and upper framework 5 at the upper ends ofthe posts 1 is provided, there being horizontal cross brace'members 6 and 7 between the 'posts and the diagonal brace 3 for strengthening the support. The base may be of any suitable size. to make a suitable I foundation which will not tip or be otherwise unsteady. An adjustable bearing 8 is mounted on the sand receptacle 4 and a fixed bearing 9 above the'part' 5 in which bearings shafts 10 and 11 are mounted for rotation.

An endless chain conveyer 12. with a succes sion of buckets 13 thereon passes around wheels on the shafts 10 and 11. A motor 14 may be used to drive the upper shaft/11,

any suitable form of driving connection beused and it is apparent that with the motor running the conveyer may carry sand placed in'the hopper 4 of thesand receptacle 4 upwardly and deliver it into 'a hopper 15 located in front of motor 14. A shaft 16 is mounted horizontally through hopper 15 and has a bell crank fixed at one end, one arm of which is weighted, as indicated at.

17 and to the other arm 18 .a rope or cable- 19 is attached the same leading over suitable guide pulleys 20 and 21, as shown and to the'lower end of which a rod 22 is connected, its free end terminating in a handle 23. Operation ofshaft 16 is designed to control the delivery of the same so that the sand delivered to the hopper 15 may return to the lower sand receptacle 4 through .the conduit 24 or be delivered to the chute 25 located directly-below the hopper 15,

'Said chute-25 is pivotally mounted at the upper end of a vertical rod '26 which is "mounted to turn about a vertical axis in bearings formed in upper and lower brackets 27 and 28 attached to'and extend- I ing in front of the posts 1. i The lower end of the rod 26 is sustained by a suitable thrust bearing carried by the lower bracket.

An extension pipe 29 is slidably mounted on the lowerend of chute 25 and maybe exbe adjusted to different positions and held therein by a set screw, and the lower end of rod 32 is formed with an eye through which the rod 22 passes.

On the vertical rod 26 a supporting structure is mounted for vertical movements lengthwise of the rod and for swinging movements about the rod. This structure comprises an upper horizontally located open frame 33, a lower block 34 and diagonally positioned braces 35 which in effect makes a rigid and strong bracket support for carrying the sand ramming device. A

screw 36 passes upwardly through the block 34, having threaded connection therewith and its lower end passes into a member 37 located below the block and fixed to rod 26. A spiral gear 38 is attached to the screw within member 37 meshing with which is a second spiral gear 39 fixed to a horizontal shaft which has a squared end 40 adapted to receive a crank for operating the screw to raise or lower the bracket supporting structure. This supporting structure turns with the rod about its vertical axis and it is apparent that a considerable range of movement therefor is provided. I

A cylindrical track 41 is attached to and extends horizontally in front of the supporting-structure. At its outer end a stop block 42 is fixed for use to limit the travel of a carriage mounted to move back and forth over the track. As shown in Figs. 3 and 4, the carriage comprises spaced apart brackets 43 between which rollers 44 are rotatably mounted to ride on track 41, a plate 45 connecting the brackets at their upper ends making a structure on which an electric motor 46 may be placed. Below the carriage the casing 47 of the sand rammingmechanism is placedand it is suspended from the carriage, having a lug 48 at its upper side passing between the brackets 43, suitable connections being made between the brackets and lug. In Fig. 2 a slight modification is indicated, the motor resting directly on plate 45 from which suitable mountings for the rollers 44 depend, the casing 47 being suspended from the motor shaft through depending side members 43*. The casing has a hopper 49 at one side into which the sand goes through chute 25 and extenslon 29 thereof and thence into the casing and at an oppdsite side is provided with an outlet 50. Y A shaft 51 asses centrally through the casing 47 and is mounted for rotation. Within the casing and attached to the shaft 51 a sand wheel 52 is located which is formed at its outside and at opposite sides' with lips 53 extending entirely around the wheel, there being a cross member 54 a distance within the outer edges of the wheel and a series of spaced apart division partitions which make a series. of pockets at the periphery of the wheel adapted to receive sand. The bottoms of the pockets are made partly by the cross members 54 and comleted by the sides 56 of a plurality of memers, one for each pocket, which are pivotally mounted on a series of short cross shafts 57 carried-by and within the. sand wheel. From each of said members an arm 58 extends inwardly, passing alongside of a cam 59 fixed to one side of the casing 47 as best shown in Fig. 3. A cam groove 60 is cut in the inner side of the cam 59 and each arm 58 has a roller 61 at its end entered into and adapted to traverse the groove when the sand wheel is rotated. The cam slot is so shaped that with the rotation of the wheel 52, as each pocket approaches the outlet at 50, the side 56 is moved about its pivot so as to force the sand from the pocketand into the outlet 50. It is apparent that with the wheel rotating to the right (referring to Fig. 2), as each pocket comes to the hopper 49 a certain amount of sand is practically scooped into the pocket and rests against the movable part 56 of the bottom of the pocket, so that when this movable part is moved outward the sand is forced to go from the pocket and does not continue with the wheel.

A nozzle 62 is mounted at the end of the outlet 50 and may be turned at different angles with respect thereto, a universal joint connection, such as illustrated at 63 being used between the nozzle and outlet. A handle 64 is attached to a side of the nozzle and with it the nozzle may be turned by-the operator to direct the sand coming out of the nozzle to different parts of the flask 65 located below the lower end of the nozzle.

A pulley 66 is fixed on the motor shaft 46 and a similar pulley 67 on the shaft 51 and a belt 68 passes around such pulleys for the driving of the sand wheel by the motor. It is apparent that the sand wheel is driven at a high rate of speed by the motor and thateach pocket. receives a small amount of sand as it passes the hopper, the same bearing against the movable section 56 of the bottom of the pocket and that it is thrown from the wheel with considerable force when the section 56 is moved outward at the upper end of the outlet 50. This causes the sand to be delivered in a consecutive series of jets, one following'quickly after the other and passing from the nozzle 62 into the flask. The force of ejectment of the jets of sand makes the same collect in a compact mass in the flask and around the pattern therein so that the sand mold is ascompact and fully rammed as need be.

It will be noted that the nozzle may be turned to any position, that the carriage may be drawn back and forth on the track 41 for different widths of flasks, that the support for the carriage may be turned back and forth about the axis of rod 26 fordifferent lengthsof flasks and to reach different parts of a long flask, and that the support for the carriage may beraised or lowered for different heights of flasks as Well, the machine being practically universal in its use for' different sizes of flasks within reasonable limits. .The extension pipe to the chute 25. is automatically extended and retracted with the outward and inward movements of the carriage as well as with the lowering and raising of the support therefor. The hopper 49 is always in position to receive sand delivered from the lower'end of pipe-29.- Any excess of sand coming to the hopper 15 may be returned when it is not needed by an easy operation always readily performed by the operator of the machine. Elevating and delivering of the sand to the flask and the ramming thereof is entirely performed by the machine, no shoveling or hand ramming being necessary. Itis also apparent that the mechanism may be swungfrom side toside about the horizontal axis of the track rod 41. The device has all movements necessary to make a fully complete and operative working structure for accomplishing the ends sought.

While I have shown and described a complete and specific construction of the invention', it is realized that many changes in design may be resorted to without depart- 7 ing from the invention, and I, accordinglg, C

do not limit my invention to the spec1 form shown and described but consider myself entitled to all forms and modifications of the invention which come within the scope of the appended claims defining the invention. Q I

I claim: Y 1. In combination, a casing, sand inlet and outlet members at opposite sides of'the 'casing, a sand wheel rotatably mounted within the casing, said wheel having a plurality of pockets at its outer portions to receive sand at the inlet, to the casingan'd carry it to the outlet,each of said pockets including a movable bottom section, means to operate said movable bottom section to force the sand from each pocket as it approaches the outlet, and means to" drive the sand wheel, substantially as described. a

2. In combination, an 'inclosing casing of I substantially cylindrical form provided with a sand receiving hopper at oneside and an outlet member at the opposite side, a

sand wheel rotatably mounted within the casing and adapted to receive small quantities of sand from the hopper and eject them through the outlet member, means for driving the sand wheel and means for positively ejecting the sand from said pockets and through said outlet member, substantially as described.

' 3. In combination, a hollow cylindrical casing having a sand receiving hopper at one side and an outlet member at the opposite side, a shaft passing through the casing, a sand wheel on the shaft, said wheel having a plurality of pockets for receiving sand from the hopper located around the wheel, a movable bottom section for each pocket, means to turnthe shaft, and meansfor moving the bottom section of each pocket outwardly 'as the pockets approach and pass by the end of the outlet member,

substantially as describe .4. In combination, a hollow cylindrical casing having a sand receiving hopper at one side and an outlet member at the opposite side, a shaft passing through the casing, a sand wheel on the shaft, said wheel having a plurality of pockets around the same adapted to receive sand from the hop- .per, a movable bottom section toeach pocket pivotally mounted on the sand wheel, a cam fixed to the casing, means to turn the shaft and attached wheel, and an arm for v each movable bottom section engaging with the cam for forcing said bottom section outward as it approaches and passes by the end of the outlet member to the casing, substantially as described.

5. In combination, a support including a horizontal track, a carriage mounted to move back and forth thereon, a casin suspended from the carriage and provide with a sand hopper at one side and an outlet member at the other, means rotatably mounted within the casing for taking sand in small amounts from the hopper and ejecting it throughthe outlet member, a motor mounted on the carriage above the casing, and means to drive said rotatably mounted means within the casing from the. motor, substantially as described. i

. 6. In combination, a casing provided with 4 rod mounted on and in front of said membersfor rotation about .a vertical axis,-a

end of bracket support mounted on the rod, means to raise or lower the bracket support, a hori- Zontal track extending forward from the said bracket support, a carriage mounted to .move back and forth on the track, a casing suspended from the carriage, a sand wheel rotatably mounted within the casing, a sand hopper at one side of the casing, an outlet member at the opposite side thereof, a chute pivotally mounted at the upper end of the vertical rod and adapted to empty into the rod mounted on the support to tur about a' vertical axis, a bracket support mounted on the rod, means to raise or lower the same, a horizontal track member extendlng from the bracket support, a carriage mounted thereon to traverse the track member, a sand receiving and ejecting mechanism suspended from and movable with the carriage, a motor on the carriage for driving said mechanism. a

hopper for receiving sand to supply the said mechanism, said hopper having an open upper side, a chute pivotally connected to the'upper end of the vertical rod, an extension length thereto at its lower end adapted to telescope thereon, and means to automatically move said extension with the movements of the hopper so that the lower end of the extension is always located directly above the open upper side of the hopper, substantially as described.

9. In combination, a support, a vertical rod mounted on the support to turn about'a vertical axis, a bracket support mounted on the rod, means to raise or lower the same, a horizontal track member extending from the bracket siipport, a carriage mounted thereon to traverse the track member, a sand receiving and ejecting mechanism suspended from and movable with the carriage, a motor on v for including means for raising or lowering the carriage for driving the mechanism, a hopper movable with the mechanism for receiving sand to supply the said'mechanism, said hopper having an open upper side, a chute pivotallly connected ,to the upper end of the vertical rod, an extension length thereto at its lower end adapted to telescope thereon, a rod pivotally connected at its upper end tothe lower end of said extension and also pivotally connected to the hopper, and means to carry sand to the chute, substantially as described.

10. In combination, a sand receiving and ejecting mechanism, supporting means there-- the mechanism, means for turning the same back and forth about a vertical axis, means for swinging the same about a horizontal axis, and means for moving the same back and forth horizontally, substantially as described.

11. In combination, a sand receiving and ejecting mechanism and supporting means therefor, including mean for raising and lowering the mechanism, means for turning the same abouta vertical axis positioned a distance back of the mechanism, means for swinging the mechanism back and forth about a horizontal axis located a distance above the mechanism, and means for moving the mechanism back and forth parallel to the length of said horizontal axis, substantially as described.

12. In combination, a sand receiving and ejecting mechanism and supporting means therefor, including means for raising and lowering the mechanism, means for turning the same about a vertical axis located a distance back of the mechanism, means for swinging the mechanism back and forth about a horizontal axis located a distance above the mechanism, and means for moving the mechanism back and forth parallel to the length of said horizontal axis, said mechanism having an outlet thereto and a nozzle attached to the outlet and connected movably thereto so as to swing to any desired angle with respect to the outlet, substantially as described.

13. In combination, a support, sand conveying mechanism mounted thereon adapted to elevate sand from a lower position to the upper portion of the support, means to drive the conveying mechanism, a hopper into which the sand isdelivered, a conduit leading from the hopper back to the lower end of the conveying mechanism, a chute located below thehopper and in front of the conduit, manually operable means for delivering the sand carried to the hopper either to the conduit or to the chute, and a mechanical sand receiving and ejecting mechanism located below thechute to which the chute delivers the sand passing therethrough, sub stantially as described.

14. In combination, a support including a horizontal track, a carriage mounted to being provided with a plurality of sand receiving pockets around the same having open sides coming to the hopper and the outlet member alternately, a movable bottom section to each pocket, a cam fixed to one side of the casing, means interposed between the cam and each of said movable sections for moving the sections outwardly as the same approach and pass the end of the outlet member, a motor carried by the carriage, and means to drive the shaft and attached wheel by the motor, substantially as described.

15. In combination, means to receive small quantities of sand in quick succession from a quantity of sand and eject the same with force into a molding flask, and means for carrying and delivering sand to said first means, substantially as described.

16. In combination, means to receive small quantities of sand in quick succession from a quantity of sand and eject the same with force into a molding flask, and means for directing the sand ejected to any desired 15 a quantity of sand and ejectthe same With 20 force into a molding flask, a support for said means, and means for adjusting the a said means to any one of a large number of positions for diflerent lengths, Widths, and

heights of flasks, substantially as described. ,25

In testimony whereof I aflix my signature.

DONALD J. CAMPBELL; 

